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What are the brands and models of SDH and PCM for power communication in China?
SDH: Huawei ZTE Fiberhome Alcatel-Lucent, generally used in power backbone network.

SDH: to ordinary small power supply stations and the like, in addition to the above, there are also small manufacturers such as Riskand and Greyville.

PCM: There are many manufacturers, many of which are OEM. I don't know, ZTE Hi-Tech, Huahuan, etc. And many of them are branded.

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